cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A379261 Irregular triangle T(n, k), n >= 0, k = 1..A379213(n), read by rows; the n-th row lists the nonnegative integers m such that A184615(m) = A003714(n).

Original entry on oeis.org

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 13, 17, 18, 19, 20, 21, 22, 23, 24, 27, 28, 30, 31, 32, 25, 29, 33, 26, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 48, 54, 55, 56, 59, 60, 62, 63, 64, 45, 49, 57, 61, 65, 50, 58, 66, 51, 52, 67, 68
Offset: 0

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Author

Rémy Sigrist, Dec 19 2024

Keywords

Comments

As a flat sequence, this is a permutation of the nonnegative integers with inverse A379262.

Examples

			Triangle T(n, k) begins:
  n   n-th row
  --  ------------------------------
   0  0
   1  1
   2  2
   3  3, 4
   4  5
   5  6, 7, 8
   6  9
   7  10
   8  11, 12, 14, 15, 16
   9  13, 17
  10  18
  11  19, 20
  12  21
  13  22, 23, 24, 27, 28, 30, 31, 32
  14  25, 29, 33
  15  26, 34
		

Crossrefs

Cf. A003714, A184615, A379213, A379262 (inverse).

Programs

  • PARI
    \\ See Links section.

Formula

T(n, A379213(n)) = A003714(n).
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